Nowadays, the concept of immersion is widely used or overused by the video game industry to describe new gaming experiences for players, especially when using motion controllers. It is therefore interesting to understand how this concept fits into the process of designing video games and how game developers mobilize this notion. To try to understand how video game designers design their gameplay experiences in this context, we conducted a series of five interviews with designers in the Montreal area. We paid particular attention to interview independent developers and designers working in major studios to obtain a diversity of approaches. We found that game developers are far from sharing the same definition of immersion. Furthermore, this notion is often not directly mobilized by the designers themselves. Indeed, the results of our research have shown that designers use strategies of engagement rather than "immersion". According to our designers, an engaged player means he feels a sincere pleasure in the act in itself of playing.